Clement, Clara Erskine. Saints in Art. Gale Research Company, 1974, p. 34.
Cf. Armstrong, J. J., "Victorinus of Pettau as the author of the 'Canon Muratori'": «Irenaeus and Victorinus each associate John with the lion, Matthew with the man, Luke with the calf, and Mark with the eagle.»
Augustine, Agreement among the Evangelists, I,6,9
Male, Emile. The Gothic Image: Religious Art in France of the Thirteenth Century. HarperCollins, 1913, pp. 35–7.
Clement, Clara Erskine. Saints in Art. Gale Research Company, 1974, p. 48.
Charbonneau-Lassay, Louis. The Symbolic Animals of Christianity. Stuart & Watkins, 1970.
Schuetz-Miller, Mardith K. “Survival of Early Christian Symbolism in Monastic Churches of New Spain and Visions of the Millennial Kingdom”. Journal of the Southwest. 42.4 (2000): 763-800. Print.
”Symbols of the Four Evangelists in Christian Art”. Sacred Destinations. "Archived copy". Archived from the original on 2012-03-01. Truy cập 2012-03-16..
Tabon, Margaret. The Saints in Art. Gale Research Company, 1969, p. 72.
”Symbols of the Four Evangelists”. Sacred Destinations. "Archived copy". Archived from the original on 2012-03-01. Truy cập 2012-03-16.
"Symbols of the Four Evangelists". Sacred Destinations. "Archived copy". Archived from the original on 2012-03-01. Truy cập 2012-03-16.
"Archangels and Evangelists". Paradox Palace. "Archived copy". Archived from the original on 2012-05-02. Truy cập 2012-03-16.
